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Cannot create VLANs greater than 1024 due to MAC address reduction feature being disabled

Core issue

MAC address reduction is disabled, not permitting extended-range VLANs to be created.

Resolution

Extended (VLAN numbers up to 4096) was first supported on the Catalyst 6000 series in CatOS 6.1(1), and on the Catalyst 4000 series in CatOS 7.2(1). When attempting to add an extended-range VLAN, one of the following messages is displayed (depending on the version of CatOS software):

An example for software version 7.3(2) is as follows:

Switch> (enable) set vlan 1040
VTP advertisements transmitting temporarily stopped,
and will resume after the command finishes.
Cannot set vlans in extended range.
Reduced Mac Address feature is disabled in NVRAM.
Switch> (enable)

An example for software version 6.1(4) is as follows:

K-4003 (enable) set vlan 1040
VLAN Trunk Protocol (VTP) advertisements transmitting temporarily stopped,
and will resume after the command finishes.
VLAN number must be in the range 1..1005.
K-4003 (enable)

The following example shows how to enable MAC address reduction and create an extended-range Ethernet VLAN:

Switch> (enable) set spantree macreduction enable
MAC address reduction enabled
Switch> (enable) set vlan 1040
Vlan 1040 configuration successful

For more information, refer to Configuring Extended-Range VLANs.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 03:38 PM
Updated by:
 
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